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PennDOT Announces Virtual Plans Display for Route 18 and Williamson Road Intersection Project in Mercer County


The Pennsylvania Department of Transportation (PennDOT) invites the public to view the online plans display for a project to realign the east side of Williamson Road at its intersection with Route 18 in Hempfield, West Salem, and Sugar Grove townships, Mercer County.

The intersection is located on Route 18 (Conneaut Lake Road) just north of Thiel College on the north side of Greenville.

The project will include realigning Williamson Road on the east side to be directly opposite its intersection on the west side. It is currently offset by approximately 10 to 12 feet. It will also include radii improvements at all corners and sight distance improvements on the southeast corner of the intersection.

Work is expected to occur during the 2025 construction season.

A detour will be required during construction and is expected to be in place for approximately four months. The proposed 3-mile detour route will be posted using Route 58 (College Avenue) and Route 356 (East Main Street/ Hadley Road).

Approximately 2,600 vehicles a day use Route 18, and approximately 2,900 vehicles a day use Williamson Road, on average.

This project is funded at least in part by the Bipartisan Infrastructure Law (BIL). In 2023 alone, the BIL is bringing approximately $23.7 million in additional funding to the northwest region to be allocated by the department and its local Metropolitan and Rural Planning Organization (MPO/RPO) partners. In the northwest region, the planning partners are the Erie Metropolitan Planning Organization (MPO), the Shenango Valley MPO, and the Northwest Rural Planning Organization (RPO), for projects in Crawford, Erie, Forest, Mercer, Venango and Warren counties.

The plans display for the Route 18 and Williamson Road Intersection Project, which will be held online only, includes a handout, digital plans, and an online comment form. It will be open until October 6, 2023 and can be accessed by visiting the PennDOT District 1 website,

Those unable to access the information online may give feedback by contacting PennDOT Project Manager Michael R. Hunkele, P.E., at or 814-678-7173.

The purpose of the plans display is to introduce the project and receive public input regarding any questions or concerns with the project. It is also an opportunity for the public to review and comment on the project's potential effect upon Cultural Resources pursuant to the Advisory Council on Historic Preservation's 36 CFR Part 800 regulations implementing Section 106 of the National Historic Preservation Act.

The project documents will be made available in alternative languages or formats if requested. If you need translation/interpretation services or have special needs or have special concerns that require individual attention, contact Michael R. Hunkele, P.E., PennDOT Project Manager, at or 814-678-7173.

Pursuant to Title VI of the Civil Rights Act of 1964, PennDOT does not discriminate on the basis of race, color, national origin, gender, age, or disability. If you feel that you have been denied the benefits of, or participation in a PennDOT program or activity, you may contact the Pennsylvania Department of Transportation, Bureau of Equal Opportunity, DBE/Title VI Division at 717-787-5891 or 800-468-4201.

Subscribe to PennDOT news and traffic alerts in Crawford, Erie, Forest, Mercer, Venango, and Warren counties at

Information about infrastructure in District 1, including completed work and significant projects, is available at Find PennDOT's planned and active construction projects at

Follow local PennDOT news on Twitter and like the department on Facebook.

PennDOT District 1 is hiring for variety of positions, including CDL operators, mechanics, highway maintenance workers, civil engineers, construction inspectors, and transportation technicians. Apply online at

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Media Contact: Jill Harry, 814-678-5035 or 

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